Calorimeter-lamp.



H.V JUNKERS. CALORIMETEB. LAMP. APPLICATION FILED JAH. 6, 1904.

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Z R E ,m 0 P n jun/e215 www UNITED* STATES PATENT OFFICE.

HUGO JUNKERS, OF AIX-LA-CHAPELLE, GERMANY.

CALORIMIE TER-LAMP.

Specification of Letters Patent.

Patented April 18, 1909,

Application led January 6, 1904. Serial No. 187,874.

the art to which it appertains to make and use the same.

My present invention relates to a lamp to be used for determining the heating power of liquid fuel by the aid of a calorimeter working in a state of permanency, as for instance the calorimeter describedin my American Patent No. 555,956, and the object of my invention is, to produce a lam which may be easily handled and utilized or the exact determination of the heating power without requiring any special alterations of the calorimeter and of the necessary scales.

In the accompanying drawings :-4Figure 1 is a side elevationA of the calorimeter lamp without a weight holding attachment, partly in section. Fig. 2 is a similar view of the lamp suspended from the beam of a pair of scales and having its burner inserted into a calorimeter. Fig. 3 is an elevation of the burner, partly in section. Fig. 4vis` a plan view of the burner.

The correct determinationl of the heating power of a liquid fuel is only then made possible when the fuel is properly burned. To this end such a burner a is employed and connectedV in such a manner with the reservoir b containing the liquid fuel that the fuel led at the time being to the burner is completelyl burned without permitting any more difficulty burned parts of the fuel to return to the reservoir. 'lhe burner a shown here a so called Swedish Primus burner. Its' inner construction is fully shown in Fig. 3, from which may be seen that there is no room to allow. a store of liquid fuel to accumulate therein, for which reason but small quantities of the liquid fuel can enter the burner and must be completely burned before new quantities can follow. For this very reason an even combustion of the fuel and a state of ermanency in the calorimeter cis assured. urners of a .similar kind may, of course, be employed but should not contain a larger space for the liquid fuel than the illustrated burner.

The connection of the burner a with the reservoir b is made by means of a comparatively narrow and long tube d, which 1s attached at one side of the reservoir near the bottom thereof and is bent as at c in such a manner that the burner is standing perfectly vertical to uniformly heat the inside of the calorimeter c and at the same time prevent the back-flow of fuel particlesinto the reservoir. The vertical arm of the tube d is of such length as to permit of the burning lamp being pushed under the calorimeter c with-'- out necessitating the lengthening of the feet f of the calorimeter and yet be long. enough to permit the flame to develop at the intendedpoint within the calorimeter when the lamp' is suspended from the beam g of the scales h. The len th of the horizontal arm ofthe tube d is su rcient to prevent the lamp from contacting with the calorimeter when it. is suspended from the scale beam g, so that the oscillations of the scales are not interfered with.

From the foregoing it will be seen, that the length of .the tube d is dependent on the shape of the calorimeter employed. For volatile fuel it becomes necessary to hermetically close vthe reservoir. This would, however, result in preventing any liquid fuel from reaching the burner if the liquid fuel is not placed under a certain pressure. In order to do this, the cover 'i of the spout k used for refilling the reservoir b is provided with a relief-valve Z o f the kind used on bicycles, so that the necessary ressure inthe reservoir can be obtained y means of an ordinary air pump used by cyclists.

In every instance the burner must be arranged at one side of the reservoir b and be connected with it by means of va narrow angularly bent tube of Vsuch a length that the burner can develop its flame at the most suitable height within the calorimeter, while the reservoir lying without the calorimeter can be suspended from the beam of a pair of scales to rise and fall without coming into contact lwith the calorimeter c. By arranging reservoir and burner side by side it is made possible to reduce the height of the lamp to, such an extent that it can be passed between the feet f of the calorimeter without lengthening them, after which the lamp is suiiicientl lifted to permit the flame to develop at t e most suitable height within the calorimeter.

Tobe enabled to know at any moment the y wor pressure existing within the reservoir b a tube m is securedl to the spout 7c and to its downward branch fn, a manometer o is fastened. The end of 'the tube m is closed by means of a lmurled cap pserving for conveniently airing the reservoir. As the burner a and the tube d are placed to'one side of the reservoir b both would be off the perpendicular when suspended from the'beam g of a pair of scales. To avoid this, the manometer, tube m, spout 7c and the relief-valve lare placed oppositesthe burner a. thus counterbalancing the weight of the burner and tube (l, so that burner and reservoir are occupying a perfectly vertical position when suspended. To attain the .greatest convenience in handling the calorlmeter it is not advisable to place the lamp directly upon a'pairof scales but to provide it with a hanger 1, as in doing so, on the one hand the load on the scales may be reduced'or in other words the sensibilitythereof be increased, and on the other hand it is made possible to remove and to replace the lamp quickly and as often as necessary after the scales and the calorimeter have once been adjusted without necessitating a readjustment either of the lamp or of the calorimeter. To further simplify the handling of the lamp and to permit of the scales being placed in any desirable position adjacent to the calorimeter, the rod 7' of the han er g is provided with the joints ls and t img at right angles to each other in order to facilitate the vertical adjustment of the lamp, and the lower end of said rod is connected with -the'cover u of the reservoir b in such a manner, that on loosening the knurled nut v slipped over a flange w of the rod 1' the'latter may be turned into any desirable position and held therein when the nut 'u is tightened again,

If desired, a small Weight-holding attachment x may be either permanently or removably secured to the bottom of the reservoir b, but its presence or absence Will not in the least interfere with the lamp.

I claimj In a calorimeter lamp the combination good Working of the with a closed reservoir, of a hanger for suspending said reservoir, an angularly bent ,fuel-conveying tube attached to .the side of H Ueo JUNKERs.

Witnesses: j

HENRY QUADFLUG, Y E. M. BRUNDAGE. 

